{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

midterm1_117_Sp_10_Solutions

midterm1_117_Sp_10_Solutions - UNIVERSITY OF CALIFORNIA...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: UNIVERSITY OF CALIFORNIA College of Engineering Department of Electrical Engineering and Computer Scences EECS117 Midterm 1 Examination Spring 2010 T.K. Gustafson ; Kedar Patel March 3 2010 PRINT YOUR NAME: SID. : SIGNATURE: Do your work on the exam. If you do need to use extra sheets attach these to the exam so that these are considered as well. Make your methods clear so that partial credits is possible. There are two problems THE PROBLEMS ARE EACH WORTH THE SAME 2 Problem Number One Consider a transmission line with characteristic impedance of Z0 : 509 and a load of ZL = 75 +j15OQ. A stub with characteristic impedance Z0 : 509 is connected to this transmission line at distance if = /\/3 from the generator as shown in the figure below. For parts (a) through (e), assume: E = g and Esmb = 2. For all parts 15 = : Use the Smith chart (on the following page) for each of the following: a) The normalized load impedance. Indicate this point as ”A” on Smith chart. Also evaluate it analytically. 2L: [.5+/'3 b) The normalized load admittance. Indicate this point as ”B” on Smith chart. Also evalu— ate it analytically. ’ gL; .———/——-l”: [-5 " .3 l.é—+J3 (l-$—}1{-? LP [3 _ 1.25%? _ yL: nLEaDBF’J—‘1G c) The normalized admittance yl (the load side of the stub). Indicate this point as ”C” on Smith chart. Also evaluate it analytically. 12-; h - ,2?\ 1F” (5” ”“431 “l“? 1\ 3km) = 1+ HL¢ : 3:27 ‘ l" ”L ”gulps” 3f” =Q11ss¢A'5“°) —'. '\ NELLO=(_+ J) 311: \‘_[‘1Le§‘“ 3"”2» “fill; 11- hLCi'W d) The normalized admittance y2 (the generator side of the stub). Nokg $€Ui§ L‘; b/ Q6 ‘13 avail" I: GCVCUG "c = .3‘1864- \A‘SS yw=lgqsa+h¢5é e) The normalized input admittance ym. Indicate this point as ”D” on Smith chart. vb“ 19534,: 15:11:41va " +. H3 radam 31D— f) What minimum lengths E and Esmb Will match the load to the line. Na-Lc. 0.. Must ‘96: (”a-(7 L3 6M. ”6:” CKTC/\.€, Tim's CS fob-gt E on SUM-EM phav’c. Tin-UK Mux‘E (1° g. HS— Leah bevemd C so ( 0‘15 + .1\\ $-Eu‘o IMLHV c,a.V\.C0\ $1.? $6 vaU<* l... ‘14‘3': 'gu§@L\ length 5 = L. 115 h} length €8th = C‘ 7:61- .mS'WN = .0 51B \\ Problem Number Two A 1 volt unit step is launched on a transmission line of length L by a source With an internal resistance of 75 Q. The transmission line has a characteristic impedance of 50 Q. The load resistance is 100 Q. The time delay on the line is 10 nanoseconds. The source generates a pulse V05) of length 5 nanoseconds. Wt) 75 9 Time Delay = 10 nsec MAM 1v *— % R=100§2 ( CREW) 20:509 L t 5 nsec a) What is the amplitude of the first pulse that is launched on the line. leC'J: 21V 5‘ amplitude 2 7Y5 \l b) What is the amplitude of the first reflected pulse? When does it arive at the generator? FL: WG-50 so A use \56 3 Reglcdkefli ‘70ng VoK'Eacéa. : .1. x- 1- - 1 V amplitude = 921.5 V time of arrival = 6 c) What is the voltage across the generator resistor during the presence of the first reflected pulse? A4: HM. Bmwodwv excel Amen/6 was; CoUl co e3 % \‘S “1.9.: L g j. v \15‘ Va" 15 d) Sketch the current waveform halfway down the line for the time interval shown. liz = -La"2} [m3] ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern